Steam-generating plant.



J. L. HOFFMAN.

STEAM GENERATING PLANT.

APPLICATION FILED DEC. ML 1914.

Patented Nov. 13, 1917 2 SHEETSSHEET I 140 2/1555 as x J. L. HOFFMAN. STEAM GE NERATFNG PLANT. APPLICATION i-v Patented Nov. 13, 1917.

2 SHEETS-SHEET Z.

J'GSEFH E). EQETILEEY, POETLEJITZIL fiTEilM-GENEEATIN llpplica'iian filed December 10, 1914. Serial To all 'wiwm it may eoncern;

Be it known that l, JOSEPH L. HOFFMAN, a citizen oftlie United States, residing in l eiitlaiid ceunty of Multnonmh.

:ml State of ()regsii have invented certain ne v and. iiseiul improvements in Steam;

for running water shrew h the space in ss l double wall construeli iilli around ssicl oil pipes thsein, thereby pm i" bination the: with suxilis l e and also means fer nesting VlClQ in a ll-ant of the chzirciicte s constructisn Where iii of the he p sleam, even from the fire, Where liarii fuel which usually is l "l? ber below, is being 31: 7

pipes as i grate, er up ar- Other objects aclvain l be appareii rain the fellowing erip' one practical v taken 'itli the :i-" JQIZ AEi -ing sl et drawings, iilusare 11g the same, Whicli-- Figure 1 is a, vertical seetienal View i021- gituclinell z of :1 steam generating plum eon. ,zlructeil along the lines 05 my IIZVQHUOD; Fig. 2 is a :i'rent elevation there. 1''; 22ml 3 is a verfiicz tirmul View thereof taken on line Fig.

Referring now more in i ail so the (ll-21w: ings, 1 desi 2*, which may be 9: the usual having "the fire tubes '2 arranged lfingituaiimilljv thereof in lower poi'fimi but hrough its opposite sides, one. or ii'isrs openings, B ll, and. hire-ugh its and a OEQ-EKllDg, as l,

lit:

fipseificaiion of Letters Patent.

walls,

adapted to be connected to communicate with the interior of lhe wall structure at the sules, as 55, and the and Wall 6, said walls being made 01" steel and of double construction, as illuslmlesl Wlierebv :0 provide therein snace in Olen eomiiiunieslZiOYl 3? we interior 0 the boiler l, i inroiisli he side will and openings 3-5 mil 4 sziis limler casing. The side and encl Walls said SLIllCtuI'e csnneceol crosswise, in hall ilirectimis, within said s'fimclure, by rr s of fipss 7 'l' 8-8, said Gel. if-flnfiifi lfid into the inner Walls, Wheseb if; he in open cemrmmiczisian Wliil'l the wsser spam between double Walls an al as farni strengthen said stri,

said g stays 410 the case? in regisier the emls the pines connected into the inner walls are spenings Willi closures; as 7" and 8 whereby it psssible to accessis each pipe for ile cleaning it (if to repair ms with liners, as all 9--9 the (lmible wall struci oriiing access in the interim hinged at their (lnwnwardly :na'rically close a. .0 are (led in the lower E il. structure openings 1& as 10 for affording access in (louble ll structure, in n in clean iii: semi; and he hwtlom of said symee. sf invention here i s. it will be (if air-mils? l1 Sillii strucpes -8 exflue lower row Allin said structure. mn'ei-ing 0f fire brick ll, ieriuL will; ripening s ll 7 u "brim a eoizi'zmstion grate i 1 fling rubbis 1 other hard iue, with (lncrs opening therein, and the doors 13-13 ripen tn the ace below, zuindicated.

The 5W0 lower rows "f-pipes S8, extend;-

SHOT-Vii mat d ti pip lift

WHY.)

ing lengthwise of the structure, are also provided with suitable lire brick is for the greater portion of their length, thereby forming therebetween a combustion cham her 15, with an opening 16 through the front double wall 6 of said structure, substantially as illustrated.

The top row or" said pipes 8 extending longitudinally of said structure is also pro- 10 vided from the back end thereof forwardly for the greater portion of its length with a covering of fire brick or other suitable material. This covering for the pipes, it will be noted, constitutes directing floors or partitions whereby the heat and products of combustion are forced to make a circuitous passage upwardly, as indicated by the an rows, to the boiler tubes 22, and thence therethrough to the chimney 1.

Mounted on the front of said structure, over the opening 16 to the combustion chamber 15, is an extension 17, of double wall construction, within the wall space of which is coiled an oil supply pipe 18, which enters at the top side thereof, as indicated at 18" and emerges from the lower side thereof, as at 18, and extends thence to the oil burner 19 through the end wall of said extension 17. A steam supply pipe 20 connects over the oil pipe as it enters the extension 17, in the usual manner.

l have also provided a water supply pipe 21 leading into the space between the walls of said extension 17. and around said-oil pipe coil, with an outlet water pipe 22 from the lower side thereof. The front end of said extension 17 is provided with air inlet openings with a regulating wheel 23, adapted to be turned to control the admission of no air through the front end of said extension to the burner. An inner flaring shield 24 is mounted on the inside of said extension, around the burner 19, substantially as indi- ,cated. As the oil passes through the coil in the extension 17, it is heated and put in better condition for combustion by the heat from the combustion within the extension 17. This extension 17, providing as it does an auxiliary heating means for the oil, as

well for the water, makes it especially well adapted for marine engines.

1 realize that changes can be made in the embodiment of the invention shown here for illustrative from the spirit thereof, and I do not, therefore, limit the invention to the specific form here shown, except as I may be limited by the hereto appended claims.

I claim:

1. In a steam. generating plant of the character referred to, in combination, walls of double construction to provide water spaces therein, water pipes arranged crosswise within said structure and communicatpurposes without departing cetates ing with the water spaces in said walls, a boiler mounted in the upper part of said structure and in communication with said wall water chambers, whereby water can circulate through said pipes, said Walls and said boiler, some of said water pipes being covered with fire brick, or the like, whereby to form two combustion chambers one above the other and communicating with 4 each other in the rear of the structure, an oil burner extension mounted on said structure and opening into the upper combustion chamber, an oil supply pipe arranged in the wall of said extension, and an oil burner set within said extension and connected to said oil supply pipe, substantially as described,

2. In combination with a steam generating plant having a housing, a steam boiler and a combustion chamber, an oil burner extension from said housing in alinement with said combustion chamber and having double walls, whereby to provide a space between the walls of said extension, and means for passing water througl'l said space in said double walls of said oil burner extension, substantially as described.

3. In combination with a steam generating plant having a housing, a steam boiler, and a combustion chamber, an oil burner extension from said housing in alinement with said combustion chamber and having double walls, an oil supply pipe coiled in the space between said double walls, and an oil burner mounted in said extension and connected to said oil supply pipe, whereby said oil pipe coil is heated from the combustion in said extension, substantially as shown.

4. In a steam generating plant, a metal housing having double walls with water chamber therein, water pipes arranged in teriorly thereof and connected into said walls in communication with the water chamber therein, a boiler having its interior connected in communication with said wall water chamber, an oil burner extension opening into said housing and having double walls, an oil pipe arranged in said double wall, a burner in said extension and connected with said oil pipe, and means for running water through the space in-said double wall of said extension, whereby to heat the same, substantially as described.

'5. In a steam generating plant of the character referred to, in combination, end and side walls of double construction to provide a continuous water chamber therein, pipes arranged in layers, crosswise'o'f each other and connected at their ends into said walls, whereby water can circulate from said walls through said pipes, a boiler mounted in the upper part of said structure and in communication with saidwall water chamber, a portion of said boiler extending down into said structure and having the usual fi e tubes therethrough, eombinati'on protectors and directing floors on some of said pipes, an oil burner extension mounted on said structure and opening theieinto, an oil supply pipe arranged in the vall of said extension, an oilbul'ner set within said extension and connected tg said oil supply pipe, and

- means for running water through the Wall space 01": said extension, and around said oil pipe therein, substantially as described. 4

Signed at Portland, Oregon, this dth day of December, 1914.

JOSEPH L. HOFFMAN. In presence of R. B. FRENCH,- WARREN P. SMITH. 

